TC4钛合金真空钎焊工艺研究

本文介绍了TC4钛合金真空钎焊的工艺研究过程及结论。研究表明,采用Ti-13Zr-21Cu-9Ni钎料真空钎焊TC4钛合金,当钎焊温度为960℃、保温时间为10min时,接头室温抗剪强度最高。     

钛合金天线氩孤焊工艺研究

本文对钛合金的氩弧焊进行了探讨和论述，着重对氩弧焊时氩气保护机理、规范参数选择及工艺措施进行研究，开展了强度试验，冲击试验。某工程振子天线首次使用钛合金这一新材料，采用该工艺焊接，能满足天线强度要求和结构使用要求     

自动焊接印制版的设计及焊后清洗工艺

本文对波峰自动焊接中印制板的焊盘、焊盘孔、印制导线及其形状、尺寸以及分布等设计指标和参数作了较详细的分析.同时对印制电路板焊后清洗工艺中清洗剂的选择和清洗步骤作了简介.     

电子机械工艺技术的发展与我们的差距

本文是作者赴英参观国际航空展览及有关电子厂家的观后感。文中主要介绍了国外电子机械与工艺技术的发展水平,以及我们在这方面存在的差距。     

流媒体技术在电子商务活动中的应用

流媒体技术支持电子商务活动中大数据量的信息流的流式传输,提高了信息流的畅通。流媒体技术可支持数字商品及商务决策信息的流式传输与发布。本文分析了基于网络的流媒体信息分发技术,归纳了流媒体技术在电子商务活动中的应用类型,构建了流媒体技术在电子商务活动中应用机制的基本模型。     

BS—1型电脑探鱼仪系统的研制

本文主要阐述新近研制成功的BS—1型电脑探鱼仪系统的组成、工作原理及主要技术指标,并详细介绍了该探鱼仪的设计特点。     

环氧锌鳞片涂料耐蚀性研究

本文主要通过盐雾试验以及天然曝晒试验的方法，对自行研制的环氧锌鳞片涂料五常用的其他防蚀涂料进行对比分析，评价，并介绍一些该涂料在工程上的应用实例。     

触摸面板工艺

随着电子技术的发展,多功能、密集型、智能化的电子产品对操纵控制系统的要求越来越高。触摸面板作为一种新型操纵控制系统逐步得到推广使用。本文介绍触摸面板的结构及加工工艺。     

Organizing for external technology exploitation in diversified firms

Besides applying technology in their own products, industrial firms increasingly exploit their technologies externally, for example through out-licensing. Earlier studies cannot explain the discrepancies between a few pioneering firms in active technology licensing and the managerial difficulties of many others. In diversified firms, diverging interests of the corporate and business unit level in the keep-or-sell decision constitute a central barrier to active licensing. Therefore, this article examines two essential dimensions of designing the corporate/business unit interface in diversified firms: the centralization of the activities on the corporate level and the alignment between the organizational levels. The study tests three hypotheses regarding the interaction and consequences of these organizational dimensions with data from 152 firms. Consistent with the hypotheses, the data provide support for the benefits from medium levels of corporate centralization and corporate/business unit alignment. The results have implications for technology exploitation, open innovation, markets for technology, and corporate strategy.     

Divergent diffusion: Understanding the interaction between institutions,firms, networks and knowledge in the international adoption of technology

Why do certain technologies diffuse globally while others spread only within certain areas of the world? I analyze the uneven process of international technology diffusion by focusing on how institutions moderate the impact of firm, network, and knowledge characteristics on the adoption of technology. The study shows that better economic institutions lower transformation costs; that similarities across social institutions minimize transmission costs; and that effective political institutions reduce transaction costs for technology diffusion. The impact of each institution-type on the diffusion process is based on the relative weight of the three different knowledge dimensions embedded in the technology. Complex technologies are most affected by economic institutions; tacit technologies are most dependent on social institutions; and systemic technologies are most influenced by political institutions.     

薄壁精密铸件的铸造工艺发展现状

本文叙述目前国内外大型复杂薄壁铸件的铸造工艺发展概况及现有的技术水平,同时介绍了作者的实践体会,提出我国发展大型复杂薄壁铝合金铸件的技术关键及发展途径,以推动我国的铸造技术赶超先进水平。     

变压器防震抗干扰的新工艺

本文叙述了C型双线包全波整流用变压器引起机震、干扰大的根源,提出了消除震动、减少干扰的制作新工艺。